Development of in-situ electrochemical heavy metal ion sensor using integrated 1D/0D/1D hybrid by MWCNT and CQDs supported MnO2 nanomaterial

Bhuvaneswari, K.; Radha, S.; Sreeja, B. S.; Kumar, P. Senthil

doi:10.1016/j.envres.2023.115570

Cited by 13 publications

(1 citation statement)

References 27 publications

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“…Then 40 µl of the working solution, containing both Bi (III) and the sample, was deposited and preconcentrated onto the WE surface for anodic stripping analysis. This resulted in in-situ electrodeposition of Bi (III), which reduces the complexity and time for modifying the WE, compared to a priori functionalization [33,42].…”

Section: Reagentsmentioning

confidence: 99%

Laser-Induced Graphene Electrochemical Sensor for Quantitative Detection of Phytotoxic Aluminum Ions (Al 3+ ) in Soils Extracts

Loaiza,

Roche,

Renjifo

et al. 2023

Preprint

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Aluminum in its Al3+ form is a metal that inhibits plant growth, especially in acidic soils (pH < 5.5). Rapid and accurate quantitative detection of Al3+ in agricultural soils is critical for the timely implementation of remediation strategies. However, detecting metal ions requires time-consuming preparation of samples, using expensive instrumentation and non-portable spectroscopic techniques. As an alternative, electrochemical sensors offer a cost-effective and minimally invasive approach for in situ quantification of metal ions. Here, we developed and validated an electrochemical sensor based on bismuth-modified laser-induced graphene (LIG) electrodes for Al3+ quantitative detection in a range relevant to agriculture (1 to 300 ppm). Our results show a linear Al3+ detection range of 1.07–300 ppm with a variation coefficient of 5.3%, even in the presence of other metal ions (Pb2+, Cd2+, and Cu2+). The sensor offers a limit of detection (LOD) of 0.34 ppm and a limit of quantification (LOQ) of 1.07 ppm. We compared its accuracy for soil samples with pH < 4.8 to within 89–98% of spectroscopic methods (ICP-OES) and potentiometric titration. This technology's portability, easy to use, and cost-effectiveness make it a promising candidate for in situ quantification and remediation of Al3+ in agricultural soils and other complex matrices.

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Section: Reagentsmentioning

confidence: 99%